no satisfing picture with US-Wii

hello,

i got my us-wii (2nd hand) today but any of the video out possibilities is
kinda "broken"- theres moving light stripes in both the composite signal and
component signal, and if i use rgb, the picture seems to be ok and stripeless
but its tinted in red - as if theres g and b missing... i tested it on my
hdtv (component and composite) and on my commodore 1084 (composite and rgb).
guess, the video out is somehow defective, what do you think..?